Brandon asked in SportsCycling · 10 months ago

Could a 20 x 3 inch innertube fit in a 20 x 4 tire ?

2 Answers

  • David
    Lv 6
    10 months ago

    Tubes have very little structural strength in themselves, and can often stretch several times their nominal size. If your tube truly is only meant to be used in a 2” wide tire,it’ll have to stretch more than intended. This will make it thinner, and slightly more sensitive to flats, but is generally not an immediate problem.

  • 10 months ago

    Most tubes aren't width size specific; they usually have a width size range.   You'll just have to look on the tube and see what is printed on it.

    Source(s): Motorized Bicycle Owner and Builder.
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